Memory terms: diagram \((c)\)  and \((d)\)  in Fig.REF , are processes where a GW is emitted by the binary system and scattered off the curvature induced by GW themselves. In that case all the gravitons are attached to dynamical multipoles, and we must pay attention in addressing their computation. They contribute to the conservative dynamics starting at 5PN as first noticed in [1]} in the context of linearized gravity, and then in [2]}. In order to distinguish between the two diagrams, we will refer to diagram \((d)\)  as double emission.
